package client;/*

 */

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @ClassName NettyClientHandler
 * @Author Final
 * @Project DataStructures
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    /**
     * 当通道就绪就会触发该方法
     * @param ctx
     * @throws Exception
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("Client"+ctx);

        ctx.writeAndFlush(Unpooled.copiedBuffer("hello,server:", CharsetUtil.UTF_8));
    }

    /**
     * 当通道由事件读取时，会触发
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf=(ByteBuf) msg;

        System.out.println("服务器回复的消息："+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址:"+ctx.channel().remoteAddress());

    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
